'Average mass' presentation slideshows

Chapter 2 Atoms, Molecules, and Ions

Chapter 2 Atoms, Molecules, and Ions. Jim Geiger Cem 151. Atomic Theory of Matter. The theory of atoms: Original to the Greeks Leuccipus, Democritus and Lucretius (Aristotle thought they were nuts) John Dalton (1805-1808)

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2.2 The Periodic table and Chemical Properties

2.2 The Periodic table and Chemical Properties. Arrange the following shapes into a pattern of rows and columns that is logical . Dmitri Mendeleev + VIDEO. Just like you , he searched for patterns among elements

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Atoms and Elements

Atoms and Elements. Goals: Describe atomic structure and define atomic number and mass number. Understand the nature of isotopes and calculate atomic weight from the isotopic masses and abundances. Explain the concept of the mole and use molar mass in calculations.

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CHEM LESSON 3

CHEM LESSON 3. ATOMS AND ELEMENTS. DO-NOW. What are the three parts of an atom called?. Atoms and Elements. Each element consists of atoms that differ from the atoms of other elements. An element can be identified by the number of protons in the nucleus. . Atoms and Elements.

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The Periodic Table

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The Simplest Matter

The Simplest Matter. The Elements. An element is matter made of only one kind of atom. There are 110 known elements, and 90 of those occur naturally on Earth. . Chemists have created a chart called the Periodic Table of the Elements to help them organize and display the elements. .

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The Mole and Molar Mass

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Warm-Up

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Stoichiometry

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CHEM LESSON 3

CHEM LESSON 3. ATOMS AND ELEMENTS. DO-NOW. What are the three parts of an atom called?. Atoms and Elements. Each element consists of atoms that differ from the atoms of other elements. An element can be identified by the number of protons in the nucleus. . Atoms and Elements.

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ANSWERS to HOMEWORK 1.3.3 Questions (page 64)

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Isotope Quiz

Isotope Quiz. Top Questions Missed. #1 Difficulty: Finding the number of protons. You need to know: Atomic NUMBER is the number of P_____________________ Protons! Atomic MASS is two things added together: P_________ & N__________ Protons and neutrons!.

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Isotopes

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Chapter 17 Section 2

Chapter 17 Section 2. Masses of Atoms. Atomic Mass. The nucleus contains most of the mass of the atom Protons and neutrons are much bigger than electrons The unit of measurement for these particles is the atomic mass unit ( amu ) About equal to the mass of 1 proton or 1 neutron.

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Chapter 5 Sections 2 and 3

Chapter 5 Sections 2 and 3. Structure of an atom nucleus - center of an atom -discovered by Ernest Rutherford in 1911 proton (p + ) -positively charged subatomic particle -found in the nucleus of an atom -discovered by Eugen Goldstein in 1886 -mass= 1.67 X 10 -24 g.

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The Periodic Table of Elements

The Periodic Table of Elements. A Brief Overview of the Patterns on the Periodic Table. Write these notes on page 15. Before we get started, make sure you know:. Columns are vertical (up and down ) Columns on the periodic table are called groups. Rows are horizontal (side to side )

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How to Start your Lab Report

How to Start your Lab Report. CHEMISTRY NAME ________________ EXPERIMENT NUMBER #3 SECTION DATE SEARCHING FOR REGULARITY NAME(S) OF LAB PARTNER(S). Searching for Regularity. Objective: To observe mathematical and graphical relationships between mass and volume. Procedure:.

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ISOTOPES

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